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Can dark energy be explained by symmetrons?(Phys.org)—A field that permeates the universe and gives rise to a new force, or "fifth force," between massive objects may be a candidate for dark energy and an explanation for why the expansion of the universe is accelerating. This field, called the symmetron field, is so named because it has a symmetry in regions of high density, while in regions of low density, such as a vacuum, the symmetry is broken and the field mediates the new force.http://phys.org/news278574377.html
PhysicsMon, 28 Jan 2013 09:00:02 ESTnews278574377Jets at CMS and the determination of their energy scaleJets are the experimental signatures of quarks and gluons produced in high-energy processes such as head-on proton-proton collisions. As quarks and gluons have a net colour charge and cannot exist freely due to colour-confinement, they are not directly observed in Nature. Instead, they come together to form colour-neutral hadrons, a process called hadronisation that leads to a collimated spray of hadrons called a jet.http://phys.org/news261218467.html
PhysicsWed, 11 Jul 2012 09:41:28 ESTnews261218467Rice physicists find reappearing quantum triosUsing atoms at temperatures colder than deep space, Rice University physicists have delivered overwhelming proof for a once-scoffed-at theory that's become a hotbed for research some 40 years after it first appeared. In a paper available online in Science Express, Rice's team offers experimental evidence for a universal quantum mechanism that allows trios of particles to appear and reappear at higher energy levels in an infinite progression. The triplets, often called trimers, form in special cases where pairs cannot.http://phys.org/news179749630.html
PhysicsFri, 11 Dec 2009 10:27:59 ESTnews179749630